Rough dimensions for my support was as follows:
I'm no carpenter by the way but it worked out!
I think it was 10.5" wide x 8.25" tall. You will need to lift the dash up ever so gently to slide/wedge the support under the dash. I also put a pad under the back edge of the support so as to not rip or tear the wrap that it sits on. If you are really good, you should probably make the back of the support a little shorter than the front as the doghouse cover slopes up from front to back. I didn't do that so you'll need to be careful when wedging it in so you don't rip anything under it.
It's only a 1x6" deep as I basically built a 1x6" box, put a 1x6" on the back to make sure nothing slide out the back on the bottom shelving but then that allowed a couple of inch gap on the top so that I can run the inverter wires through the top and into the support. I put a 1x6" in the middle to really do the supporting of the dash and it also separates the overall box so that you can put the shelves on the left (or right sides) if you wanted. I used 1/2"x6" for the "shelves". I then just stained it with dark walnut gel that we had left over from a front door re-staining we did a while back. Put it on with paper towels so that it looked a little aged like the floor. I did the same thing with the middle round table (can see it a bit in the picture) I put in between the captains chairs. I put walnut on the table, sanded it a little to take the darkness out, then put on a ipswich pine stain/sealer to try and make it look more like the floor. Wasn't perfect but I think it turned out ok......again, I'm no finish carpenter!
If I can do it..........anyone can!
2014.5 FR3 25DS for the family!
1989 Wrangler YJ for fun!
29er Mountain bikes for stress relief!
As many RV trips as possible for the lifestyle!